Braking device with actuating device

Abstract

An elevator cage is movable along at least two guide rails and the elevator cage is equipped with a braking system. The elevator braking device has a brake housing and a force store. The brake housing is mounted to be displaceable between a first position and a second position. The force store acts on the brake housing and pushes the brake housing in the direction of a second position. In addition, the elevator braking device includes an actuator which can act on the brake housing and keep the brake housing in a first position. The actuator in its first setting can hold the brake housing in the first position against the force of the force store. In a second setting the actuator enables pushing of the brake housing into the second position. A brake element is thereby brought into contact with the brake rail.

We claim: 
     
       1. An elevator braking device for braking a traveling body movable in a vertical direction in an elevator installation, comprising:
 a brake housing being arranged on the traveling body, the brake housing being mounted in a vertical guide of the traveling body and displaceable in the vertical direction in the vertical guide between a first position and a second position; 
 a force store that exerts a force on the brake housing and urges the brake housing toward the second position; and 
 a switchable actuator with first and second settings, the switchable actuator in the first setting keeping the brake housing in the first position and in the second setting causing a braking force produced by the elevator braking device to be transmitted by the brake housing to the traveling body by contact of the brake housing with an abutment of the vertical guide; and wherein the vertical guide is positioned outside of the break housing containing the breaking device. 
 
     
     
       2. The elevator braking device according to  claim 1  wherein the switchable actuator in the second setting frees the brake housing such that the brake housing is moved toward the second position by the force store and a brake element of the elevator braking device is brought into contact with a brake rail. 
     
     
       3. The elevator braking device according to  claim 1  wherein the first position of the brake housing is below the second position relative to vertical travel direction. 
     
     
       4. The elevator braking device according to  claim 1  further comprising a support, the support being attached to the traveling body and including the vertical guide. 
     
     
       5. The elevator braking device according to  claim 4  wherein the force store includes a compression spring for moving the brake housing toward the second position. 
     
     
       6. The elevator braking device according to  claim 5  wherein the compression spring is arranged between the support and the brake housing. 
     
     
       7. The elevator braking device according to  claim 4  further comprising a brake element mounted in the brake housing and pivotable about an axis of rotation, the brake element being connected with a connecting part of the support such that the brake element is rotated when displacement of the brake housing occurs relative to the support and the brake element engages a brake rail. 
     
     
       8. The elevator braking device according to  claim 7  wherein the brake element includes a center clamping region, the center clamping region being eccentric relative to the axis of rotation such that a radial spacing from the axis of rotation to the center clamping region increases over a rotational angle. 
     
     
       9. The elevator braking device according to  claim 7  wherein the brake element includes a control eccentric with a control cam, the control eccentric being eccentric relative to the axis of rotation such that a radial spacing from the axis of rotation to the control cam increases over a rotational angle, wherein through rotation of the control eccentric a brake shoe is pressed against the brake rail. 
     
     
       10. The elevator braking device according to  claim 1  further comprising a brake element, the brake element including a centering device that keeps the brake element in a readiness setting. 
     
     
       11. The elevator braking device according to  claim 1  generating a stopping and holding force for the traveling body when the brake housing is in the second position, the elevator braking device being resettable by a release movement opposite a travel direction of the traveling body, a resetting force for the release movement being greater than the force exerted by the force store. 
     
     
       12. The elevator braking device according to  claim 1  further comprising a brake plate, wherein a brake rail or a guide rail can be clamped between a brake element and the brake plate, the brake plate being fastened to the brake housing. 
     
     
       13. The elevator braking device according to  claim 12  wherein the brake plate is fastened to the brake housing by a brake spring. 
     
     
       14. The elevator braking device according to  claim 1  wherein the switchable actuator includes a clamping electromagnet and an armature plate, wherein the clamping electromagnet can electromagnetically keep the brake housing in the first position, wherein when the brake housing is in the first position the armature plate is electromagnetically held by the clamping electromagnet. 
     
     
       15. The elevator braking device according to  claim 14  wherein the switchable actuator includes an assisting weight that keeps a blocking roller in contact with the brake housing. 
     
     
       16. The elevator braking device according to  claim 14  wherein the switchable actuator includes an assisting spring. 
     
     
       17. The elevator braking device according to  claim 1  wherein the brake housing is displaceable in the vertical guide between the first position in contact with a lower abutment of the vertical guide and the second position in contact with the abutment being an upper abutment of the vertical guide. 
     
     
       18. An elevator installation, comprising:
 an elevator cage, 
 a guide rail, the guide rail comprising a brake rail, the elevator cage being movable in a vertical direction along the guide rail; and 
 an elevator braking device for braking the elevator cage, comprising,
 a brake housing being arranged on the elevator cage, the brake housing being mounted in a vertical guide of the elevator cage and displaceable in the vertical direction in the vertical guide between a first position and a second position, 
 a force store that urges the brake housing toward the second position, and 
 a switchable actuator with first and second settings, the switchable actuator in the first setting keeping the brake housing in the first position and in the second setting causing a braking force produced by the elevator braking device to be transmitted by the brake housing to the elevator cage by contact of the brake housing with an abutment of the vertical guide; and wherein the vertical guide is positioned outside of the break housing containing the breaking device. 
 
 
     
     
       19. The elevator installation according to  claim 18  the brake housing is displaceable in the vertical guide between the first position in contact with a lower abutment of the vertical guide and the second position in contact with the abutment being an upper abutment of the vertical guide.